Add support for default TTL for custom date property

Author: dirkkul

integration/test_collection_config.py

@@ -1881,14 +1881,13 @@ def test_object_ttl_custom(collection_factory: CollectionFactory) -> None:
     collection = collection_factory(
         properties=[wvc.config.Property(name="customDate", data_type=DataType.DATE)],
         object_ttl=Configure.ObjectTTL.delete_by_date_property(
-            date_property="customDate",
-            post_search_filter=False,
+            date_property="customDate", post_search_filter=False, time_to_live_after_date=-1
         ),
         inverted_index_config=Configure.inverted_index(index_timestamps=True),
     )
 
     config = collection.config.get()
     assert config.object_ttl_config is not None
     assert config.object_ttl_config.delete_on == "customDate"
-    # assert config.object_ttl_config.time_to_live is None
+    assert config.object_ttl_config.time_to_live == datetime.timedelta(seconds=-1)
     assert not config.object_ttl_config.post_search_filter

weaviate/collections/classes/config_object_ttl.py

@@ -41,7 +41,7 @@ def delete_by_creation_time(
         """Create an `ObjectTimeToLiveConfig` object to be used when defining the object time-to-live configuration of Weaviate.
 
         Args:
-            time_to_live: The time-to-live for objects in seconds.
+            time_to_live: The time-to-live for objects in seconds. Must be a positive value.
             post_search_filter: If enabled search results will be filtered to remove expired objects that have not yet been deleted.
         """
         if isinstance(time_to_live, datetime.timedelta):
@@ -55,16 +55,22 @@ def delete_by_creation_time(
     @staticmethod
     def delete_by_date_property(
         date_property: str,
+        time_to_live_after_date: Optional[int | datetime.timedelta] = None,
         post_search_filter: Optional[bool] = None,
     ) -> _ObjectTTLCreate:
         """Create an Object ttl config for a custom date property.
 
         Args:
             date_property: The name of the date property to use for object expiration.
+            time_to_live_after_date: The time-to-live for objects in seconds after the date property value. Can be negative
             post_search_filter: If enabled search results will be filtered to remove expired objects that have not yet been deleted.
         """
+        if isinstance(time_to_live_after_date, datetime.timedelta):
+            time_to_live_after_date = int(time_to_live_after_date.total_seconds())
+        if time_to_live_after_date is None:
+            time_to_live_after_date = 0
         return _ObjectTTLCreate(
             deleteOn=date_property,
             postSearchFilter=post_search_filter,
-            defaultTtl=None,
+            defaultTtl=time_to_live_after_date,
         )